Combttstion engines



Reissued Aug. 11, 1925. UNITED STATES PATENT OFFICE.y

JOHAN EEEDEIX BJEKGEEN, or HoLMeA'rAN, FALUN, SWEDEN, AssIGNon, BY mEsNE ASSIGNMENTS, To EEGULAx ENGINE coRrqRA'rIoN, or WILMINGTON, DELAWARE, A CORPORATION or DELAWARE. l

EEGULATING MECHANISM Fon. coNTE-oLLING THE sUrrLY` or FUEL 'To INTERNAL- COMBUSTION ENGINES.

Original No. 1,410,360, dated March 21:, 1922,J Serial No. 351,1758, led .Tanna fy is, 1920. Application for .reissue med may 2, i923, serial No. 636,260.

To all whom it may concern.'

Be it known that I, JOHAN FREDRIK BJRKGREN, a subject of the King of Sweden, residing at Holmgatalr 2, Falun, Sweden, have invented a certain new and useful Improvement in Regulating Liechanism for Controlling the Supply of Fuel to Internal- Combustion Engines, of which the following is a specification.

l0 The present invention relates to an arrangement for controlling the fuel supplyv to internal combustion engines. The. ar-

rangement in question is extremely sensltlve and always supplies the motor with a qurantity of fuel exactly corresponding to the speed and load of the motor.

The invention is principally'characterized l by a "sleeve which is mounted on to rotate with but slidable along the motor shaftor a Ashaft connected therewith,l the said sleeve being providedwith an annular groove or recess which extends obliquely with respect to the axis of the shaft, Aa non-rotatable ring being retained in the said groove or recess so,as to be shifted back and forth on account of the oblique relation of the groovel or recess, which motion imparted to the plungerof the fuel pump, said plunger being actuated directly or indirectly by said ring. As the sleeve provided with the-ring is displaced to different positions on the shaft,-the vrelative distance is change between the ring and the pump plungerfor between the ring and a member which actuatesthe pump plunger. Thus the length of strokeof the plunger and the quantity of the fuel sup# plied are also changed.

The` displacementv of the ring-carrying sleeve on the shaft takes place automatically This is due to the ring being connected with and actuated by a weightwhich is slidably mounted to move radially in a disk-like member attached to theshaft and acted uponample, Fig. 1 being a longitudinal section on variations in the speed of the motor.v

sequently',the length of stroke of the of the arrangement and Fig. an end view 'thereof 1 is the motor shaft, attached. to which is a disk-like member 2. In the .latter the weight 3I is slidable in a radial direction, the same being guided by a pin 4 fastened to the disk, which pin is surrounded by a spring 5 tending to move the weight inwardly towards the anis. of Cthe disk. Attached to the weight are two wedges 6 situated one on each side of the shaft 1 and bearing against the oblique end face of a sleeve? which is mounted on to rotate with but is'slidable along shaft 14. The sleeve 7 is engaged by a spring 8 so as to be pressed into contact with the wedges. In the sleeve 7 there .is provided an oblique groove orrecess which encircles the sleeve. Anon-rotatable ring 1() engages in said groove or recess and is provided with a projection or arm 11 abutting against the one arm 12 of a bell-crank lever, whose other arm 13 abuts against the\pump plunger 14.

In operation the ring 10 is caused to be moved back and forth on account of the obliquegroove or recess 9, and its projection or arm 11 moves to and fro in the direction of the axis of the shaft, thereby actuating .the bell-crank lever l2, 13 by means of which the plunger of the fuel pump is actuated. The speed of the motor being normal, the weight is kept in a normal position through 'the centrifugal force acting thereon, said posit-ion of the weight determining the normal position of the sleeve on the shaft, that is to say,A the normal. distance between the Vperiod during which the arm' or projection 11' acts-on the arm 12 is extended, and, con- Y ump plunger,and hence the quantity of fue supplied, will be increased in a corresponding degree. If, on the other hand, the themotor increases, the conditions will be speed of reversed, the Weight then moving outwardly by the increasing centrifugal' force, whereby the slee-ve7 is displaced towards the left, thus withdrawingY the ring arm or pro]ection 11 from the, arm 12 so vthat the lengt-,h1

of the pump' stroke is diminished.

To i regulate the length of the suction stroke `of the pump, notwithstanding the automatic control brought about by means of the arrangement above described, thereis provided in thefixedkpart 15, a rotatably mounted eccentric 16 adapted to be adjusted by-ha'nd, the arm 13 striking said eccentric when it moves back on the suction stroke of the plunger 14. The magnitude of this back motion of the plunger may be regulated by" turning the eccentric more or less.

What I claim as new and desire to secure by Letters Patent of the United States is: 1. A regulating mechanism to control the supply o f fuel for internal combustion engines, characterized by a sleeve mounted on to rota-te with but slidable along a motorf placeable along said shaft, .a non-rotatable ring mounted upon the sleeve obliquely With respect to the axis of the shaft, whereby back andA forth movement ofthe ring is. effected incident to the rotation of the shaft and sleeve, an arm carried by the ring, a lever actuated by'the armiand adapted to drive apower pump, and centrifugally con-- trolled` means arrangedf to displace the sleeve along the Yshaft to vary the stroke of the lever. l

3. A regulating mechanism according to claim 1 characterized by a lever actuated by the ring and an adjustable` abutment coacting with the lever tolimit the movement thereof.

4. In a .regulating mechanism to'control the supply of fuel for internal combustion engines an engine driven shaft, a sleeve mounted on to rotate with but slidable along said shaft, centrifugally operated vvedging means to slide said sleeve in one direction, means to yieldingly resist the sliding movement of said sleeve,'and means actuated by the slee-ve and controlled by its sliding movements to control the supply of rfuel tothe i engine, f I

5. In a regulating mechanism to control the supply of fuel for internal cembustion engines an engine driven shaft, a sleeve 65,

.mounted on to rotate with but'slidable along said shaft, a-sp-ring acting Qn said sleeve to normally maintaln it 1n ione? limit "of its u sliding movement on the shaft, centrifugally operatedA wedging means to f displace the V sleeve against the action of the spring, and

means actuated by the sleeve and ycontrolled V by its position on the shaft to control the A supply of fuel to lthe engine.

6.111 a regulatingmechanism to control thev supply of fuel for internal combustion 'engines an engine driven shaft, a ysleeve mounted on to rotate withv but slidable along vsaidvshaft, a springactingon said sleeve to normally maintain it in one limit of its sliding movement on the shaft, a radially movable centrifugally operated means lhaving a Wedge'member arranged to engage said sleeve and operating to displace the same against the action of said spring, and means to utilize thedisplacement of the sleeve to control the supply of fuel to the engine.

' R'i'. In an apparatus of the class described, an engine drivenshaft, a sleeve mounted to rotate with but-slidable along said shaft, aspring operating against one end of said sleeve, a Wedge member engaging the other end of said sleeve, means controlled by the speed of the engine to shift said Wedge member and displacing said sleeve on the shaft, 95. and means to utilize'the displacement vof said sleeve to control the supply ofI fuel lto the engine. A 5

,8. In an apparatus of the class' described,

an engine driven shaft, a-sleeve mountedy to 1.00.

rotate with but slidable along said shaft, said sleevehaving an inclined surface at one end thereof, a spring operating` against the other end of said sleeve, a Wedge member engaging the' inclined end surface 105 of said sleeve, means controlled by the speed of the engine to shift said Wedge member for displacing the sleeve on the shaft, and

-. `means to utilize the` displacement of the sleeve to, control the'speed of the engine. @4110 9. In 1an apparatus Iof the class described, .l an eng/ine driven shaft, a sleeve mounted to rotate With'but slidable along said shaft, a spring operating against one end of said sleeve, a Wedge meniber engagingthe other endoffsaid sleeve, a radially movable kmiember connected to said Wedge member and centrifugally operated. by the speed of the engine to7shift said Wedge member and displace the sleeve on the shaft, and means to 12V .utilize the displacement. of said sleeve to control the supply of fuelvto the engine.

JOHAN FREDRIK BJRKGREN. In the presence ofgL.. Bnocn. 

